| Patent Number |
Title Of Patent |
Date Issued |
| RE38615 |
System and method for decreasing ratio changing time in electronically enhanced powertrain syste |
October 12, 2004 |
| A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine spe |
| RE34260 |
Dual pressure pressurized fluid actuated shifting mechanism |
May 25, 1993 |
| A control (220) for providing a dual pressure source (236) of pressurized fluid to a pressurized fluid operated shift actuator (30) for a mechanical change gear transmission (202) is provided. |
| 7452305 |
Driveline torque reducer |
November 18, 2008 |
| A vehicular powertrain system includes a prime mover having an output, a multi-ratio transmission having an input, and a torque reduction coupling system coupling the prime mover output and the multi-ratio transmission input. The exemplary torque reduction coupling system includes a clut |
| 7108117 |
Centrifugal clutch |
September 19, 2006 |
| A vehicular centrifugally operated master friction clutch (20) for coupling an engine (18) to a transmission input shaft (28). The clutch includes flyweights (110) pivoted to a driving member (60) rotatable with the engine. Rollers (120) fixed to the flyweights act on ramp surfaces ( |
| 6981931 |
Method and apparatus for providing momentary torque reversal for a transmission having an automa |
January 3, 2006 |
| An automated vehicle transmission having a wet clutch and an auxiliary motor that is operatively connected to the transmission to overcome residual torque forces in the wet clutch. Residual torque forces in the wet clutch may prevent disengagement of a gear train and also prevent the |
| 6962551 |
Automated transmission system control with zero engine flywheel torque determination |
November 8, 2005 |
| A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (T.sub.EG (for zero flywheel torque)) resulting in zero flywheel torque (T.sub.FW =0). The engine (102) is c |
| 6561948 |
Control for transmission system utilizing centrifugal clutch |
May 13, 2003 |
| A control system/method for controlling a vehicle drivetrain (10) including an engine (18), a transmission (12) and, a centrifugal clutch (20) for drivingly coupling the engine output (136) to the transmission input shaft (28) during vehicle launch. A system controller (50) issues comman |
| 6526816 |
Transmission gear life monitor system |
March 4, 2003 |
| An integral gear life monitor system and method for determining gear use and damage is disclosed. The system includes a first and second sensors for measuring the rotational speed and torque of a driveline component, such as an input shaft of a vehicle transmission, for a particular gear |
| 6502476 |
Transmission system utilizing centrifugal clutch |
January 7, 2003 |
| A vehicular transmission system (10) including a centrifugally operated master friction clutch (20) for drivingly coupling an engine (18) to an input shaft (28) of a mechanical transmission (12). Closed loop engine speed (ES) control is utilized to control engagement of the clutch during |
| 6500093 |
Automated transmission system control with zero engine flywheel torque determination |
December 31, 2002 |
| A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (T.sub.EG (for zero flywheel torque)) resulting in zero flywheel torque (T.sub.FW =0). The engine (102) is c |
| 6461274 |
Automated transmission system control with zero engine flywheel torque determination |
October 8, 2002 |
| A control system/method for an at least partially automated transmission system (100) includes means to determine engine fueling required to cause a gross engine output torque (T.sub.EG (for zero flywheel torque)) resulting in zero flywheel torque (T.sub.FW =0). The engine (102) is c |
| 6394931 |
Starting and driveline shock protection control method and system |
May 28, 2002 |
| A method and system of controlling a maximum start gear ratio of an automated mechanical transmission system is disclosed. To protect the clutch under conditions of level ground up to a mild grade, a maximum starting gear is determined by the system when a valid Gross Combination Wei |
| 6325743 |
Automated transmission upshift control |
December 4, 2001 |
| 3A method/system for controlling upshifting in an automated mechanical transmission system (10) utilized on a vehicle preferably having an ECU (28) controlled engine brake (ECB) or inertia brake (26). When an upshift from a currently engaged ratio (GR) is required (ES>ES.sub.U/S), ski |
| 6223592 |
Independent control of transmission-side and engine-side retarding devices during ratio changes |
May 1, 2001 |
| A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system include independently controlling at least one engine-side retarding device and at least one transmission-side retarding device. The retarding devices are s |
| 6205389 |
Method/system for resetting the value of a control parameter indicative of gross combine weight |
March 20, 2001 |
| A system/method of resetting the value of a control parameter (GCWCP) indicative of vehicular gross combined weight and determined as a filtered/averaged value, to a predetermined default value upon sensing vehicle operating conditions (50% GCWCP<GCWTEST or 200% GCWCP>GCWTEST)d |
| 6178366 |
Method/system for initiating automatic upshifting in an automated mechanical transmission system |
January 23, 2001 |
| A control system/method to initiate upshifts in an automated mechanical transmission system (12). Upshifts are normally initiated on the basis of sensed throttle position (THL) or demand. In certain situation upshifts are initiated on the basis of sensed or calculated engine torque. |
| 6149545 |
Automated transmission upshift control |
November 21, 2000 |
| A method/system for controlling upshifting in an automated mechanical transmission system (10) utilized on a vehicle preferably having an ECU (28) controlled engine brake (46). When an upshift from a currently engaged ratio (GR) is required (ES>ESU/S), skip upshifts (GRTARGET=GR+N, |
| 6126569 |
Starting and driveline shock protection control method and system |
October 3, 2000 |
| A method/system for controlling an automated mechanical transmission system (10) utilized on a vehicle. To protect from driveline damage due to clutch "popping," upon sensing vehicle launch conditions (clutch (16) not engaged, transmission (14) engaged (THL>REF.sub.THL and OS<R |
| 6116105 |
Method/system for controlling upshifting after resetting the value of a control parameter indica |
September 12, 2000 |
| A system/method of resetting the value of a control parameter (GCW.sub.CP) indicative of vehicular gross combined weight and determined as a filtered/averaged value, to a predetermined default value upon sensing vehicle operating conditions deemed indicative of a change in vehicle lo |
| 6105449 |
Control for controller-assisted, manually shifted, synchronized, input splitter-type compound tr |
August 22, 2000 |
| A control for enhanced manual shifting in a computer-assisted (48) vehicular splitter-type compound transmission (16) having a synchronized main section (16A) shifted by a manually operated shift lever (31) and a controller (42). The splitter section (16B) is located at the input end of |
| 6095947 |
Control for controller-assisted, manually shifted, synchronized, splitter-type compound transmis |
August 1, 2000 |
| A control for enhanced manual shifting in a computer-assisted (48) vehicular splitter-type compound transmission (16) having a synchronized main section (16A) shifted by a manually operated shift lever (31) and a controller (42). The splitter section (16B) is located behind the main |
| 6095003 |
Control for controller-assisted, manually shifted, synchronized, splitter type compound transmis |
August 1, 2000 |
| A control for enhanced manual shifting in a computer-assisted (48) vehicular splitter-type compound transmission (16) having a synchronized main section (16A) shifted by a manually operated shift lever (31) and a controller (42). The splitter section (16E) is provided with a three-po |
| 6066071 |
Automated transmission downshift control |
May 23, 2000 |
| A method/system for controlling downshifting in an automated mechanical transmission system (10) utilized on a vehicle. When a downshift from a currently engaged ratio (GR) is required (ES<ES.sub.D/S), skip downshifts (GR.sub.TARGET =GR-N, N>1) and then single downshifts (GR.sub.TA |
| 6052638 |
Engine flywheel torque control |
April 18, 2000 |
| A control system/method for controlling engine (12) flywheel (T.sub.FW) torque in a vehicular powertrain system (10) including an electronically controlled engine and a torque load limited drivetrain system (11) is provided. The control will sense values of a control parameter (GR, OS) |
| 6044721 |
Control for controller-assisted large backlash jaw clutches in main and auxiliary sections |
April 4, 2000 |
| A control for enhanced manual shifting in a computer-assisted (48) vehicular splitter-type compound transmission (16) having a nonsynchronized, enlarged backlash main section (16A) shifted by a manually operated shift lever (31) and a controller (42). The splitter section (16E) is pr |
| 6042507 |
Torque converter lockup control |
March 28, 2000 |
| A control for providing a smooth, high quality torque converter lockup event in an automated mechanical transmission system (10) including a fuel-controlled engine (12) and a mechanical transmission (14) drivingly coupled by a torque converter and torque converter lockup clutch assembly |
| 6015366 |
Vehicular semi-automatic shift implementation system for lever-shifted, splitter-type, compound |
January 18, 2000 |
| A semi-automatic shift implementation system (100) for a lever-shifted mechanical transmission (10) includes an intent-to-shift sensor (122), such as an intent-to-shift button (120). Upon sensing an intent to shift, a controller (146) will cause the engine to be fueled to minimize to |
| 5984831 |
Adaptive upshift jaw clutch engagement control |
November 16, 1999 |
| A control system for controlling jaw clutch (88) engagement for completing upshifts. The synchronous window ((OS*GR.sub.T).+-.offset) for commanding jaw clutch engagement is increased upon sensing relative great vehicle deceleration (dOS/dt<REF.sub.1) or relatively great vehicle accel |
| 5904635 |
Partially automated lever-shifted mechanical transmission system |
May 18, 1999 |
| A partially automated transmission system (100) and method for controlling same is provided. The system includes a manually shifted splitter-type transmission (10) having a spatter section (14) and a manually shifted main section (12). The splitter section is controlled by a splitter |
| 5904068 |
Semi-automatic shift implementation with synchronized transmission emulation |
May 18, 1999 |
| A semi-automatic shift implementation system (100) for a manually shifted, output-splitter-type compound transmission (10) having gear ratios selectively engaged and disengaged by jaw clutches (48, 50) selectively positioned by a shift lever (57). The system will sense a main transmi |
| 5842376 |
System and method for decreasing ratio changing time by actuating inertia brake while the master |
December 1, 1998 |
| A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine spe |
| 5755639 |
Semi-automatic shift implementation with automatic splitter shifting |
May 26, 1998 |
| A semi-automatic shift implementation system (100) for a manually lever (57) shifted, splitter-type transmission (10). Lever shifts are semi-automatically implemented by automatic splitter shifting and, upon sensing transmission neutral, automatic control of engine fueling to cause s |
| 5735771 |
Semi-automatic shift implementation |
April 7, 1998 |
| A semi-automatic shift implementation system (100) for a manually shifted transmission (10) having gear ratios selectively engaged and disengaged by means of jaw clutches (48, 50) selectively positioned by a shift lever (57). The system will sense a transmission neutral condition and a t |
| 5682790 |
Synchronizing and gear engagement sensing logic for automated mechanical transmission system |
November 4, 1997 |
| Control logic for an automated mechanical transmission system (100) allows signals indicative of input shaft (IS) and output shaft (OS) rotational speed to be utilized to determine engagement of a target gear ratio (GR.sub.T) without false readings caused by engine synchronizing. |
| 5661998 |
Three-position actuator piston assembly and actuator system utilizing same |
September 2, 1997 |
| A pressurized fluid-operated, three-position shift actuator piston assembly (12) and associated control system (10) are provided. The system requires only a single controlled source of pressurized fluid (A) to provide movement to and retention in a selected one of three axially displaced |
| 5655407 |
System and method for decreasing ratio changing time in electronically enhanced powertrain syste |
August 12, 1997 |
| A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine spe |
| 5651292 |
Splitter shift mechanism and control |
July 29, 1997 |
| A splitter-type compound transmission (110) is provided with a splitter clutch (180) having increased backlash and a three-position actuator (202) controlled by a microprocessor-based controller (222). The controller will receive inputs for various sensors including a sensor indicating t |
| 5620392 |
Engine accessory torque and engine deceleration rate linear relationship and engine rotational m |
April 15, 1997 |
| A method/system for controlling an automated transmission is provided wherein upon assembly of a vehicle, the intercept (A) and slope (B) values defining the presumed linear relationship between engine deceleration rate and engine accessory torque (dES/dt rate=A+(B * T.sub.ACCES)) and/or |
| 5582069 |
Engine accessory torque and engine deceleration rate determination method/system |
December 10, 1996 |
| An adaptive control system/method for an at least partially automated vehicular mechanical transmission system (10) is provided for determining the value of a control parameter (T.sub.ACCES) indicative of accessory torque when the vehicle is in motion and the value of a control parameter |
| 5528950 |
Transmission inertia brake with ball ramp actuator |
June 25, 1996 |
| An inertia brake is coupled to a rotating shaft of a vehicle transmission where a ball ramp actuator energized by an electrical coil is used to load a clutch pack which frictionally creates a braking torque on the rotating shaft to facilitate synchronous gear engagement. A control system |
| 5517876 |
Transmission spring loaded shift device |
May 21, 1996 |
| A transmission shifting system for a gear change transmission where an actuator responding to a control signal is used to axially displace a secondary shift rail thereby preloading a spring acting upon a primary shift rail where a coupling element permits relative motion between the |
| 5517411 |
Neutral attainment control system/method for controlling shifting in vehicular automated mechani |
May 14, 1996 |
| A robust engine fueling control is provided for assuring neutral attainment in a vehicular automated mechanical transmission system (10) having a manually controlled master clutch (16). Upon sensing a requirement for a shift into transmission neutral, the disengaging jaw clutch members |
| 5509867 |
Engine flywheel torque determination method/system |
April 23, 1996 |
| An adaptive control system/method for an at least partially automated vehicular mechanical transmission system (10) is provided for determining the current value of a control parameter (T.sub.FW) indicative of engine flywheel torque. Engine flywheel torque (T.sub.FW) is determined as a |
| 5508916 |
Control for engagement of positive clutches in automated mechanical transmission systems |
April 16, 1996 |
| A control method/system for controlling engagement of a target gear ratio (GR.sub.T)in a vehicular automated mechanical transmission system (10) is provided. The control causes engine speed (ES) to be alternately greater than and then less than synchronous engine speed (ES=IS=OS*GR.sub.T |
| 5491630 |
Method/system for resetting the value of a control parameter indicative of gross combined weight |
February 13, 1996 |
| A system/method of resetting the value of a control parameter (GCW.sub.CP indicative of vehicular gross combined weight and determined as a filtered/averaged value, to a predetermined default value, or to a test value, upon sensing vehicle operating conditions (OS=Oand t>REF) deemed |
| 5490063 |
Control method/system including determination of an updated value indicative of gross combinatio |
February 6, 1996 |
| A control system/method for determining vehicular gross combined weight (GCW) is provided. GCW is determined immediately after upshifts of a transmission (10) and requires only input signals indicative of engine or driveline torque (DL), vehicle acceleration (dOS/dt) and currently engage |
| 5487005 |
Method/system for determination of gross combined weight of vehicles equipped with electronic da |
January 23, 1996 |
| A control system/method for controlling a vehicular, at least partially automated system (110) separate from the vehicular transmission system (10), such as a CTIS or ABS, is provided. The at least partially automated system is controlled as a function of a value (GCW) approximating vehi |
| 5444623 |
Reengagement control/method for mechanical transmission system with automatic shift implementati |
August 22, 1995 |
| A reengagement control system/method (200) for a semi-automatic mechanical transmission system (104) of the type requiring manual synchronization of the transmission to enable automatic implementation of a selected shift into a target gear ratio is provided. The reengagement control will |
| 5425689 |
Engine brake enhanced upshift control method/system |
June 20, 1995 |
| A control system/method for an at least partially automated mechanical transmission system (10), inclading a controller (106) operated engine brake (EB), is provided. The control system/method is effective to determine if selected upshifts into a target gear ratio are feasible (212, |
| 5335566 |
Shift control method/system |
August 9, 1994 |
| A control system/method for an at least partially automated mechanical transmission system (10) is provided for determining if selected upshifts into a target gear ratio are feasible (208) or not feasible (210) under current vehicle operating conditions and for prohibiting the initiation |
